Nam, Le Van, Duong Thanh Nghi, and Le Thi Kim Ngan. “USING INDEX FOR ASSESSMENT OF WATER QUALITY AND CLASSIFICATION OF EUTROPHICATION LEVELS IN THE QUANG NINH - HAI PHONG COASTAL AREA”. <i>Vietnam Journal of Marine Science and Technology</i> 17, no. 4 (August 6, 2018): 490–497. Accessed November 5, 2025. https://cip.vast.vn/jmst/article/view/8141.